Office 365 (Outlook on the web | Outlook for Windows | Mac) - Account Access Error

When you attempt to open another mailbox (user, service, or resource account), you may receive one of the following errors:

404 error

The reason you are receiving this error is because you do not have the proper mailbox permissions to access the account.

You will need to contact the owner of the account and ask them to grant you full-mailbox permissions.

something went wrong error http 500 code

This error appears because your account does not have the proper permissions (linked) or your permissions are no longer working to access the account.

In some cases, the assigned permissions do not get set correctly, try the following work around:


If you the above troubleshooting does not resolve your issue, contact your domain administrator and ask that they perform the steps listed below.

See Also: